PenJin

Other mistake: The first time Kick-Ass tries to stop a crime, when he gets stabbed in the belly and run over by a car, the stick he's carrying is too big to have fitted in his backpack or in his clothing. He could not have been carrying it.

PenJin

The Penguin's a Jinx (2) - S1-E4

Continuity mistake: When the Penguin goes to Wayne Manor to put Batman and Robin to sleep with the gas from his umbrella, just before he shoots the orange gas at Robin's suit of armor, there's a quick shot of the armor's helmet. The problem is that there's already an orange stain on the face of the helmet from the orange gas that comes out of the tip of the umbrella, even before Penguin shoots any gas. (00:19:15)

PenJin